Pump.



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PUMP

(Application :Bled Mar. 16, 1900.)

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(No Model.)

UNITED STATES ALDEN L. CAMPBELL, OF MANCHESTER, VIRGINIA.

PUMP.

SPECIFICATION forming part of Letters Patent No. 687,725, dated December3, 1901.

\ Application filed March 16,1900. Serial No. 8,924. (No model.)

.T0 all whom t may concern:

Be it known that l, ALBEN L. CAMPBELL, a citizen of the United States,residing at Manchester, in the county of Chesterfield and State ofVirginia, have invented certain new and useful improvements in Pumps, ofwhich the following is a speciiicat-ion.

This invention relates to new and useful improvements in double-actingpumps; and its primary object is to provide a device of this characterwhich is simple in construction and provided with novel means wherebythe pump may be easily operated, producing a continuous iiow of water.

To this end the invention consists, primarily, of abeam having avertically movable or working fulcrum and connected in a suitable mannerto pistons movable within double cylinders secured to a discharge-pipeor similar device at points below the level of the water within the wellor tank, &c. Suitable valves are arranged between the cylinders and thedischargepipe,whereby water may be discharged from the chambers of eachcylinder alternately.

The invention also consists in the further novel constructions andcombinations of parts hereinafter more fully described and claimed, andillustrated in the accompanying drawings, showing the preferred form ofmy invention, and in which-- Figure 1 is a front elevation of myimproved device broken away and shown partly in section. Fig. 2 is asection on line 2 2, Fig. 1. Fig. 3 is an enlarged central verticalsection through acylinder and pistons therein.

Referring to said figures by numerals of reference, 1 is apump-standard, having a passage 2 extending longitudinally therethroughand terminating at its upper end in a spout 3 or in other suitableoutlet. The lower end of said passage opens intoa transverse passage 4.(Shown in Fig. 1.) Near its upper end the pump-standard is recessed onopposite sides, as at 5, and within these recesses are fitted parallelarms 6, connected at their ends by cross-strips 7 and forming a beam 8,said ends 7 being connected by an arc-shaped brace 9, preferablyextending over the top of the standard 1 and provided with l a handle10. The beam 8 is provided at the center of the arms 6 with trunnions1l, vertically movable between parallel guides 12, secured to thestandard 1 and extending over the recesses 5.

Hung between the arms 6 at a point 13 at each side of the trunnions 11are rods 13, which extend downward and are jointed to piston-rods 14.Each of said rods 111 projects downward into and to a point near thebottom of acylinder (designated, respectively, by the numerals 15 and15a) which is yopen at both ends and provided with a central head ofpartition 16, thereby forming an upper and a lower chamber therein,(numbered 17 and 1S, respectively.)

To the lower end of rod 14. is secured a valved piston 19, movablewithin the chamber 18 of the cylinder. A valved piston 2O is adapted towork Within the upper chamber 17 of the cylinder, and this is providedwithl a sleeve 21, which fits over the rod 14. and may be securedthereto in any suitable manner, as by means of a set-screw 22.

The cylinders 15 and 15a are secured one to each side of the standard 1at the outlets of the transverse passage 4, and valves 23 are providedbetween each chamber of the cylinders and said passage. These valves areeach adapted to open when its piston moves toward the same. It will beunderstood that the cylinders 15 15' are similar in construction andoperation and that the same should be arranged below the level of thewater at all times.

The pistons 2O normally restin the positions shown in Figs. 1 and 3,thestop 24 between the guides 12 serving to support the parts. When thehandle 10 is swung in the direction of the arrow shown in Fig. 1, thepistons in the cylinders 15 and 15 are moved in opposite directions,compressing water against the partition 16 and forcing the same underpressure out into the passage 2. Upon rocking the beam 8 in the oppositedirection the operation above described will be repeated, and it willthus be seen that all power employed is applied directly upon the Water.

While I have shown and described my invention adapted for use withwells, it will be IOO understood that the same is not limited to suchuse, as the cylinders may, if desired, be suitably connected with ahydrant, (te.

In the foregoing description I have shown the preferred form of myinvention; but I do not limit myself thereto, as I am aware thatmodifications may be made therein without departing from the spirit orsacrificing the advantages thereof, and I therefore reserve the :rightto make such changes as fairly fall within the scope of'my invention.

Having thus fully described my invention, what I claim as new, anddesire to secure by Letters Patent, is-

l. A pump comprising a hollow standard having an outlet near its upperend, a transverse passage near its lower end, and parallel transverserecesses adjacent to its upper end; parallel arms extending through saidrecesses, and connected at their ends by a swinging handle; trunnionsprojecting centrally from said arms; vertical guides spanning thetransverse recesses within which the trunnions extend and are looselyguided; cylinders open at their ends secured at opposite sides of thestandard and communicating with the passage therein; partitions withinsaid cylinders; piston-rods extending within said cylinders and carryingvalved pistons; and rod connections between said piston-rods andparallel arms.

2. A pump comprising a hollow standard having an outlet near its upperend, a trans-v verse water-passage near its lower end, and parallelrecesses near its upper end, parallel arms extending through saidrecesses; parallel vertically-disposed guides extending across saidparallel recesses; a brace connecting the ends of said arms andextending between said guides; trunnions projecting centrally from theouter sides of said arms; rods pivotally suspended between said arms;piston-rods pivotally connected to the lower ends of said suspendedrods; cylinders into which the piston-rods extend secured to oppositesides of the standard and communicating with the water-passage thereinby valved openings; central horizontal portions within said cylinders;and valved pistons on said pistonrods above and below said partitions.

In testimony whereof I affix my signature in presence of two witnesses.

ALDEN L. CAMPBELL. Witnesses:

A. C. AUKIssoN, B. C. CooK.

